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 * Copyright (c) 2006, 2011, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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 */

package java.lang;

abstract class CharacterData {

  abstract int getProperties(int ch);

  abstract int getType(int ch);

  abstract boolean isWhitespace(int ch);

  abstract boolean isMirrored(int ch);

  abstract boolean isJavaIdentifierStart(int ch);

  abstract boolean isJavaIdentifierPart(int ch);

  abstract boolean isUnicodeIdentifierStart(int ch);

  abstract boolean isUnicodeIdentifierPart(int ch);

  abstract boolean isIdentifierIgnorable(int ch);

  abstract int toLowerCase(int ch);

  abstract int toUpperCase(int ch);

  abstract int toTitleCase(int ch);

  abstract int digit(int ch, int radix);

  abstract int getNumericValue(int ch);

  abstract byte getDirectionality(int ch);

  //need to implement for JSR204
  int toUpperCaseEx(int ch) {
    return toUpperCase(ch);
  }

  char[] toUpperCaseCharArray(int ch) {
    return null;
  }

  boolean isOtherLowercase(int ch) {
    return false;
  }

  boolean isOtherUppercase(int ch) {
    return false;
  }

  boolean isOtherAlphabetic(int ch) {
    return false;
  }

  boolean isIdeographic(int ch) {
    return false;
  }

  // Character <= 0xff (basic latin) is handled by internal fast-path
  // to avoid initializing large tables.
  // Note: performance of this "fast-path" code may be sub-optimal
  // in negative cases for some accessors due to complicated ranges.
  // Should revisit after optimization of table initialization.

  static final CharacterData of(int ch) {
    if (ch >>> 8 == 0) {     // fast-path
      return CharacterDataLatin1.instance;
    } else {
      switch (ch >>> 16) {  //plane 00-16
        case (0):
          return CharacterData00.instance;
        case (1):
          return CharacterData01.instance;
        case (2):
          return CharacterData02.instance;
        case (14):
          return CharacterData0E.instance;
        case (15):   // Private Use
        case (16):   // Private Use
          return CharacterDataPrivateUse.instance;
        default:
          return CharacterDataUndefined.instance;
      }
    }
  }
}
